Created attachment 1456995[details]
"Screenshot" showing the kernel stack trace on a laptop
Description of problem:
After upgrading to Fedora 28, the system boot hangs due to these settings in /etc/modprobe.d/*:
options nf_conntrack hashsize=2000000
Version-Release number of selected component (if applicable):
kernel 4.17.3-200.fc28
How reproducible:
100%, bot on VM's and laptops.
Steps to Reproduce:
1. Install Fedora 27, upgrade to Fedora 28
2. Create a file /etc/modprobe.d/test.conf containing "options nf_conntrack hashsize=2000000"
3. Do a modprobe nf_conntrack
4. Watch the fireworks
Actual results:
Kernel crash
Expected results:
Happy system
Additional info:
[root@test ~]# modprobe -v nf_conntrack
insmod /lib/modules/4.17.3-200.fc28.x86_64/kernel/lib/libcrc32c.ko.xz
install /sbin/modprobe --ignore-install nf_conntrack $CMDLINE_OPTS && /sbin/sysctl --quiet --pattern 'net[.]netfilter[.]nf_conntrack.*' --system hashsize=2000000
insmod /lib/modules/4.17.3-200.fc28.x86_64/kernel/net/netfilter/nf_conntrack.ko.xz hashsize=2000000 hashsize=2000000
<CRASH>
The issue seems to be caused by repeating hashsize=2000000 twice. Doing a manual insmod with hashsize=2000000 only once seems to cause no problems.
We apologize for the inconvenience. There is a large number of bugs to go through and several of them have gone stale. Due to this, we are doing a mass bug update across all of the Fedora 28 kernel bugs.
Fedora 28 has now been rebased to 4.18.10-300.fc28. Please test this kernel update (or newer) and let us know if you issue has been resolved or if it is still present with the newer kernel.
If you have moved on to Fedora 29, and are still experiencing this issue, please change the version to Fedora 29.
If you experience different issues, please open a new bug report for those.
Created attachment 1456995 [details] "Screenshot" showing the kernel stack trace on a laptop Description of problem: After upgrading to Fedora 28, the system boot hangs due to these settings in /etc/modprobe.d/*: options nf_conntrack hashsize=2000000 Version-Release number of selected component (if applicable): kernel 4.17.3-200.fc28 How reproducible: 100%, bot on VM's and laptops. Steps to Reproduce: 1. Install Fedora 27, upgrade to Fedora 28 2. Create a file /etc/modprobe.d/test.conf containing "options nf_conntrack hashsize=2000000" 3. Do a modprobe nf_conntrack 4. Watch the fireworks Actual results: Kernel crash Expected results: Happy system Additional info: [root@test ~]# modprobe -v nf_conntrack insmod /lib/modules/4.17.3-200.fc28.x86_64/kernel/lib/libcrc32c.ko.xz install /sbin/modprobe --ignore-install nf_conntrack $CMDLINE_OPTS && /sbin/sysctl --quiet --pattern 'net[.]netfilter[.]nf_conntrack.*' --system hashsize=2000000 insmod /lib/modules/4.17.3-200.fc28.x86_64/kernel/net/netfilter/nf_conntrack.ko.xz hashsize=2000000 hashsize=2000000 <CRASH> The issue seems to be caused by repeating hashsize=2000000 twice. Doing a manual insmod with hashsize=2000000 only once seems to cause no problems.